So I am developing a new GoI and some how my first of business for this is to make a tale for it.
But I am thinking of writing a SCP object first since I have to make some expositions for the first tale.
If you want to see my post on my GOI idea, here:

So the SCP object that I want to make are a series of print ads, billboards, posters and the like that are scattered across a certain area. This SCP object will change all existing ads within radius and make it an instance of this SCP object. Now the second thing about this is how this SCP influence a person; lets say the SCP object is an ad for a brand of toothpaste, that person will have an urge to buy that product for a couple of days,weeks or even months.

Reports of how the SCP object was discovered; that it was first used as a campaign poster of a certain
politician, who won a landslide victory.After that, the second report was it was used for advertisments.

JerseyBoy, the point of this forum is to give feedback on concepts and outlines rather than drafts. As such, your post does nothing to help this user while simultaneously lowering their odds of getting in depth feedback because threads with no replies are priortized by reviewers. Please be more mindful in the future.

A large pitfall of most attempts to introduce a new GOI is making the first article an obvious goi introduction first and foremost. In other words, making the article and its contents secondary to the goi. Ads for an anomalous media conglomerate would certainly give this feel to the audience, especially since the concept itself is quite boringly logistical. Of course they need ads and would try to hide them, so where is the interesting story in there? The additional compulsion effect also adds a pet peeve for many users due to compulsion effects ultimately being lazy plot devices that force characters to act in a certain manner.

I know what I said about being this as a first entry of this GOI as weak but this is just a mere concept. This is but the capacities of what the GoI can do, yet now that you mention that the concept of this scp is boring.The nature of this GOI is all about media and things alike.Starting this is somehow hard, especially when you work without any contributors. I need some help(and not being desperate). So can you give me some first tales or scps of other GOIs. It would be a great help.

I don't think it's a bad idea. But I think you need to spice it up. For example, have anomalous companies using this advertising company. Say Dr. Wondertainment or Herman Fuller's Circus of the Disquieting as examples. Maybe give the billboards anomalous properties, like being able to block the attention of the 'non-consumer' audience like the Global Occult Coalition, The Foundation, Chaos Insurgency etc.

You could even have this SCP discovered, because of another anomalous group like Gamers Against Weed or Are we Cool yet, vandalising the billboards. I'd have this SCP discovered maybe in the 90's or the 2000's before digital advertising took off and replaced these Billboards usefulness, or they were replaced with other anomalous advertisement. The Foundation could have some of the billboards in storage, maybe noting that they stay impeccably clean and are normally damage resistant or self-repair if damaged. As a way to counter non-anomalous vandalism.

If you wanted, you could also make the billboards partially sentient, able to mimic posters or images shown to them. Which is how they advertise these companies.